Ladder leveler

ABSTRACT

A ladder leveling device to be secured to a side rail of a ladder having a pair of adjustable arms and a self-adjustable, automatic locking device, attachable to either rail of any standard extension or regular ladder.

United States Patent Inventor Earl Waldren 3827 Park Ave., Covington, Ky. 41015 Appl. No. 74,686

Filed Sept. 23, 1970 Patented Nov. 9, 1971 LADDER LEVELER 1 Claim, 5 Drawing Figs.

U.S. Cl 182/204 Int. Cl E06c 7/44 Field ofSearch 182/204, 205, 201, 209

[56] References Cited UNITED STATES PATENTS 3,032,140 5/1962 Hunt 182/201 3,167,153 1/1965 Trumpolt 182/204 Primary Examiner-Reinaldo P. Machado Att0meyEdward J. Utz

ABSTRACT: A ladder leveling device to be secured to a side rail of a ladder having a pair of adjustable arms and a self-adjustable, automatic locking device, attachable to either rail of any standard extension or regular ladder.

PATENTEDN V 9 I97! SHEET 1 or 2 ATTORNEY PATENTEDunv 9 I97! SHEET 2 BF 2 ATTORNEY LADDER LEVELER My invention relates to a ladder leveler and more particularly to a device which is attachable to a ladder such as has side rails and rungs.

The principal object of my invention is to provide an adjustable, readily attachable device to be secured to the side rails of an ordinary ladder which leans against an object to support it.

Another object of my invention is to provide a ladder leveler which is easily and readily secured to one or both side rails of a ladder and'which has a locking device.

Another object of my invention is to provide a selfadjustable automatic locking device attachable to either rail of any standard extension or regular ladder, eliminating the necessity of blocking under one side when using on uneven ground or steps.

Another object of my invention is to provide a locking device so that the leveler which automatically locks when weight such as provided by a user climbing the ladder is applied to the rungs and through the rungs to the side rails.

In general my invention comprises a device securable to either rail of a standard extension or regular ladder, which eliminates the necessity of blocking under either side when the ladder is used on uneven ground or steps. The device is also provided with an automatic locking device and is self-adjustable The ladder leveler is secured to a side rail of an extension ladder and locked by members which are pivotally secured to an arm slidable within a slot of the leveler rail when downward force is applied to the ladder.

Other objects of my invention and details of construction will definitely appear from the detailed description to follow, in which:

FIG. 1 is a view in front elevation of my invention;

FIG. 2 is a view in side elevation of my invention;

FIG. 3 is a view in rear elevation of my device;

F IG. 4 is a detailed, sectional view taken along the lines 4- 4 ofFlG. l; and

FIG. 5 is a view in perspective of my invention secured to the side rail of a ladder.

Referring to FIG. 1, I show a leveler rail to which a plate 11 is secured by means of bolts such as 12. The plate 11 is secured within a recess 13 in leveler rail 10 and is provided with a slot 14 which extends into the rail 10. The slot 14 receives a bolt 15 which bolt is slidable within said slot. The bolt 15 is provided with a pair of washers such as 16 and 17 and a nut 18 is riveted to it after assembly. The bolt 15 is slidable within slot 14. The bolt '15 also provides a pivotal point for a pair of arms 19 and 20. Arm [9 is secured by a bolt 21 to an arm 20 and the arms are movable relative to each other. The other end of the arm 20 is secured to the leveler rail 10 by means of a bolt 22 and it may pivot relative to said arm 19 and said rail 10. Secured to the arm 19, I provide a pair of locking members such as 23 and 24. The locking members have a lip such as 25 which is adapted to fit the side rail of a ladder such as 26 (FIG. 5). The locking members 23 and 24 are pivotally secured by bolts 27 and 28 to the arm 19 so that movement of the arm 19 is limited by the locking engagement of members 23 and 24 in engagement with the side rail 26 of a ladder. A pair of guides 30 and 31 are secured to the leveler rail 10 and are provided with spacers 32 and 33. The guides are made to fit the side rail 26 of a ladder.

Thus in using my invention the leveler is secured to one side of an extension ladder and moved to a position so that the ladder is level and force is applied to a rung of the ladder which causes arm 19 to move within slot 14 until locking members pivotally connected to arm 19 are secured around 1 the side rail of the ladder. The ladder leveler and extension member thus is locked to the ladder.

Having thus described my invention, what I claim as new and useful and desire to secure by United States Letters Patent 1. A ladder leveling device comprising a side member, a pair of guides attached to said side member, a plate secured to said side member, a vertical slot provided in said plate and side member, a pair of arms pivotally connected at one end to each other, one of said arms pivotally connected to said side member the other of said arms movable pivotally within said slot and a pair of locking members pivotally connected to said last named rail adapted when downward force is applied to the side rail of a ladder to which said device is secured to lock about said side rail.

* i 'i l 

1. A ladder leveling device comprising a side member, a pair of guides attached to said side member, a plate secured to said side member, a vertical slot provided in said plate and side member, a pair of arms pivotally connected at one end to each other, one of said arms pivotally connected to said side member the other of said arms movable pivotally within said slot and a pair of locking members pivotally connected to said last named rail adapted when downward force is applied to the side rail of a ladder to which said device is secured to lock about said side rail. 